Heavy quark production in the semihard QCD approach at THERA

In the framework of the semihard (kT factorization) QCD approach, we consider the photoproduction of D mesons associated with two hadron jets and the D production in DIS at THERA conditions with the emphasis on the BFKL and CCFM dynamics of gluon distributions. In the photoproduction of D mesons the attention is focused on the variable xγ , which is the fraction of the photon momentum contributed to a pair of jets with largest pT . We show that our theoretical results are sensitive to the BFKL type dynamics which may be investigated at THERA energies. We also discuss possible effect of J/ψ meson spin alignement, which is thought to be a vivid manifestation of gluon off-shellness. PACS number(s): 12.38.-t, 13.60.-r, 13.87.Ce